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Epitaxial growth of Ba2YNbO6 films on biaxially-textured NiW substrates as a multifunctional single buffer layer for high Jc epitaxial YBCO film

Published online by Cambridge University Press:  01 September 2015

Sung Hun Wee ,
Claudia Cantoni  and
Amit Goyal
Sung Hun Wee*
Affiliation:
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
Claudia Cantoni
Affiliation:
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
Amit Goyal
Affiliation:
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA Departments of Chemical Biological Engineering, Physics, and Electrical Engineering, SUNY, University at Buffalo, Buffalo, NY 14260, USA
*
Address all correspondence to Sung Hun Wee at[email protected]
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Abstract

Epitaxial Ba2YNbO6 (BYNO) films were deposited on textured NiW substrates via pulsed laser deposition. The films have dense and smooth surface structure, and more importantly, significantly improved out-of-plane texture, compared with the NiW substrate texture. Transmission electron microscopy study confirms the c-axis tilting of BYNO film and formation of misfit dislocations at NiW/BYNO interface, suggesting that the improved texture should be attributed to the tilted epitaxy via biased dislocation mechanism. YBa2Cu3O7−δ films deposited on BYNO single-buffered NiW substrates show further texture improvement, high superconducting transition temperature of ~91 K, and critical current density of 1.8 MA/cm2 at 77 K, self-field.

Type
Research Letters
Information
MRS Communications , Volume 5 , Issue 3 , September 2015 , pp. 533 - 538
Copyright
Copyright © Materials Research Society 2015 

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